Straw cap



FIG. 1 i a front elevational view of a straw cap showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view with the left side being a mirror image thereof; and,

FIG. 4 is a top view thereof.

The broken line showing of the buckle in FIGS. 1,2, 3, and 4 and a portion of the strap in FIG. 4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a straw cap, as shown and described. 